938353649 has 2 divisors, whose sum is σ = 938353650. Its totient is φ = 938353648.

The previous prime is 938353643. The next prime is 938353651. The reversal of 938353649 is 946353839.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 938319424 + 34225 = 30632^2 + 185^2 .

It is a cyclic number.

It is not a de Polignac number, because 938353649 - 2¹² = 938349553 is a prime.

Together with 938353651, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 938353597 and 938353606.

It is not a weakly prime, because it can be changed into another prime (938353643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 469176824 + 469176825.

It is an arithmetic number, because the mean of its divisors is an integer number (469176825).

Almost surely, 2^938353649 is an apocalyptic number.

It is an amenable number.

938353649 is a deficient number, since it is larger than the sum of its proper divisors (1).

938353649 is an equidigital number, since it uses as much as digits as its factorization.

938353649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2099520, while the sum is 50.

The square root of 938353649 is about 30632.5586427252. The cubic root of 938353649 is about 979.0138799829.

The spelling of 938353649 in words is "nine hundred thirty-eight million, three hundred fifty-three thousand, six hundred forty-nine".